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Ingenic Jz4740: add basic frequency switching

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21625 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Maurus Cuelenaere 2009-07-03 21:34:40 +00:00
parent 9ecaa5562d
commit eabeb928dd
3 changed files with 25 additions and 6 deletions
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23
firmware/target/mips/ingenic_jz47xx/system-jz4740.c
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@ -541,10 +541,11 @@ void system_reboot(void)
void system_exception_wait(void)
{
/* check for power button without including any .h file */
while (1)
while(1)
{
if( ~REG_GPIO_PXPIN(3) & (1 << 29) )
break;
if( (~REG_GPIO_PXPIN(3)) & (1 << 29) )
return;
asm volatile("nop");
}
}
@ -574,3 +575,19 @@ int system_memory_guard(int newmode)
(void)newmode;
return 0;
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
{
unsigned long cfcr = REG_CPM_CPCCR;
cfcr &= ~CPM_CPCCR_CDIV_MASK;
if(frequency == CPUFREQ_NORMAL)
cfcr |= (0 << CPM_CPCCR_CDIV_BIT);
else
cfcr |= (2 << CPM_CPCCR_CDIV_BIT);
REG_CPM_CPCCR = cfcr;
cpu_frequency = frequency;
}
#endif